Meanings of often disjointed in English

He thinks schematically and is somewhat impatient, which helps him find structure in often disjointed book ideas.

His speeches are not sustained arguments but a series of often disjointed statements that don't cohere into anything greater.

Yet, while Rooney was prominently involved, always demanding the ball and at the heart of the action, United were often disjointed.

In the past, Confederate generals, although almost always outnumbered, had shifted their interior lines to meet the often disjointed attacks of the Union forces.